<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
      .box{
          width: 100px;
          height: 100px;
          border: 1px solid orangered;
          transform: perspective(1em) rotateX(5deg);
          margin: 100px;
      } 
    </style>
</head>
<body>
    <div class="box"></div>
</body>
</html>